The "wind sea" is the motion of the waves generated
by the wind blowing directly on the observed sea areaor in its immediate vicinity

SWELL

ItalianoMare lungo

FrançaisHoule

EspañolMar de leva

WAVE LENGTH AND HEIGHT

SPECIFICATION

Metres

0

No swell

Short waveAverage waveLong wave

Low waveModerate waveHeavy wave

< 100100 - 200 > 200

< 22 - 4> 4

1

Very low (short or low wave)

2

Low (long and low wave)

3

Light (short and moderate wave)

4

Moderate (average and moderate wave)

NOTEThe swell reports also comprise the wave direction according to
the eight main directions of the wind rose expressed in the english notation
(N, NE, E, SE, S, SW, W, NW). For instance: Swell 2 from SW or Low swell from NW.

5

Moderate rough (long and moderate wave)

6

Rough (short and heavy wave)

7

High (average and heavy wave)

8

Very high (long and heavy wave)

9

Confused (wave length and height indefinable)

The "Swell" waves are generated by winds blowing over a distant sea area
which travel rapidly over the surface with a regular period and flat crests